asp.net 分页控件
前台
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Pager.ascx.cs" Inherits="Controls_Core_Pager" %>
<style type="text/css">
.GridViewPagerStyle {
background-position: top;
background-repeat: repeat-x;
border-bottom: 1px solid #ABC7EC;
color: #15428B;
font-weight: bold;
}
.GridViewPagerStyle table {
margin: auto;
text-align: center;
}
.GridViewPagerStyle table td { border: 0px; }
.GridViewPagerStyle a {
color: #15428B;
padding: 0px 1px 0px 1px;
text-decoration: none;
}
.GridViewPagerStyle span {
color: red;
font-weight: bold;
padding: 0px 1px 0px 1px;
text-decoration: none;
}
</style>
<script type="text/javascript" language="javascript">
function checkGo() {
var txtGoObj = document.getElementById(document.getElementById('hidTextBoxGoClientID').value);
if (txtGoObj && txtGoObj.value == '') {
txtGoObj.focus();
return false;
}
return true;
}
</script>
<center>
<div style="background-color: #BBD5EC; width: 100%;">
<table class="GridViewPagerStyle" cellpadding="1" cellspacing="1" >
<tr align="center">
<td valign="middle" runat="server" id="tdAll" style="display: none;">
<asp:LinkButton ID="imgAll" Text="显示所有" runat="server" OnClick="All_Click" /> |
</td>
<td valign="middle" runat="server" id="tdPageCount">
共<asp:Label ID="lblPageCount" runat="server" Text="Label" Style="color: Red;"></asp:Label>页/<asp:Label
ID="lblRecordCount" runat="server" Text="Label" Style="color: Red;"></asp:Label>条记录 |
</td>
<td valign="middle" runat="server" id="tdCurrentIndex">
当前第<asp:Label ID="lblCurrentPageIndex" runat="server" Text="Label" Style="color: Red;"></asp:Label>页
</td>
<td valign="middle">
<asp:LinkButton ID="imgFirstPage" runat="server" OnClick="imgFirstPage_Click" Text="首页"></asp:LinkButton>
</td>
<td valign="middle">
<asp:LinkButton ID="imgPrePage" runat="server" OnClick="imgPrePage_Click" Text="上页"></asp:LinkButton>
</td>
<td valign="middle">
<asp:LinkButton ID="imgNextPage" runat="server" OnClick="imgNextPage_Click" Text="下页"></asp:LinkButton>
</td>
<td valign="middle">
<asp:LinkButton ID="imgLastPage" runat="server" OnClick="imgLastPage_Click" Text="尾页"></asp:LinkButton>
</td>
<td>
</td>
<td valign="middle" runat="server" id="tdTextGo">
转到<asp:TextBox ID="txtGo" runat="server" Width="20px" Height="12" onkeyup="this.value=this.value.replace(/\D/g,'')"
onafterpaste="this.value=this.value.replace(/\D/g,'')"></asp:TextBox>页
</td>
<td valign="middle" runat="server" id="tdImgGo" align="center">
<asp:ImageButton ID="imgGo" AlternateText="跳转页面" ImageUrl="../../Images/Go.gif" OnClick="imgGo_Click"
ImageAlign="Middle" runat="server" Height="21px" Width="28px" OnClientClick=" return checkGo(); " />
</td>
</tr>
</table>
</div>
</center>
<asp:HiddenField ID="hidCurrentPageIndex" runat="server" />
<asp:HiddenField ID="hidPageSize" runat="server" />
后台：
public partial class Controls_Core_Pager : System.Web.UI.UserControl
{
public delegate void GridViewDelegate();
#region Delegate
public event GridViewDelegate InitLoadData;
public event GridViewDelegate PageingLoadData;
public event GridViewDelegate BeforePageing;
public event GridViewDelegate AfterPageing;
private const string firstenabledimgurl = "~/Image/pager/first.gif";
private const string firstdisabledimgurl = "~/image/pager/first_disabled.gif";
private const string lastenabledimgurl = "~/image/pager/last.gif";
private const string lastdisabledimgurl = "~/image/pager/last_disabled.gif";
private const string prevenabledimgurl = "~/image/pager/prev.gif";
private const string prevdisabledimgurl = "~/image/pager/prev_disabled.gif";
private const string nextenabledimgurl = "~/image/pager/next.gif";
private const string nextdisabledimgurl = "~/image/pager/next_disabled.gif";
#endregion
public bool SimplePager
{
set
{
this.tdAll.Visible = !value;
this.tdCurrentIndex.Visible = !value;
this.tdImgGo.Visible = !value;
this.tdPageCount.Visible = !value;
this.tdTextGo.Visible = !value;
}
}
protected void Page_Load(object sender, EventArgs e)
{
}
public int RecordCount
{
get { return (ViewState["RecordCount"] != null) ? (int)ViewState["RecordCount"] : 0; }
set { ViewState["RecordCount"] = value; }
}
public int PageSize
{
get
{
if (string.IsNullOrEmpty(hidPageSize.Value) ||Convert.ToInt32( hidPageSize.Value)<=0)
hidPageSize.Value = "20";
return int.Parse(hidPageSize.Value);
}
set
{
hidPageSize.Value = value.ToString();
}
}
public int CurrentPageIndex
{
get { return (hidCurrentPageIndex.Value == string.Empty) ? 0 : int.Parse(hidCurrentPageIndex.Value); }
set { hidCurrentPageIndex.Value = value.ToString(); }
}
public void LoadData()
{
if (InitLoadData != null)
{
InitLoadData();
ShowStatus(0);
}
}
public void ReLoadData()
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
private void ShowStatus(int currentPageIndex)
{
int pageCount = Convert.ToInt32((RecordCount - 1) / PageSize + 1);
lblRecordCount.Text = RecordCount.ToString();
hidCurrentPageIndex.Value = currentPageIndex.ToString();
if (RecordCount == 0)
{
lblPageCount.Text = "0";
lblCurrentPageIndex.Text = "";
}
else
{
lblPageCount.Text = pageCount.ToString();
lblCurrentPageIndex.Text = Convert.ToString(currentPageIndex + 1);
}
if (pageCount == 0 || ((currentPageIndex + 1) == 1 && pageCount == 1))
{
imgFirstPage.Enabled = false;
imgPrePage.Enabled = false;
imgNextPage.Enabled = false;
imgLastPage.Enabled = false;
}
else
{
if (currentPageIndex == 0)
{
imgPrePage.Enabled = false;
imgFirstPage.Enabled = false;
imgNextPage.Enabled = true;
imgLastPage.Enabled = true;
}
else if ((currentPageIndex + 1) == pageCount)
{
imgFirstPage.Enabled = true;
imgPrePage.Enabled = true;
imgNextPage.Enabled = false;
imgLastPage.Enabled = false;
}
else if (currentPageIndex != 0 && (currentPageIndex + 1) != pageCount)
{
imgFirstPage.Enabled = true;
imgPrePage.Enabled = true;
imgNextPage.Enabled = true;
imgLastPage.Enabled = true;
}
}
}
protected void imgFirstPage_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
CurrentPageIndex = 0;
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
protected void imgPrePage_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
CurrentPageIndex = CurrentPageIndex - 1;
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
protected void imgNextPage_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
CurrentPageIndex = CurrentPageIndex + 1;
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
protected void imgLastPage_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
CurrentPageIndex = Convert.ToInt32((RecordCount - 1) / PageSize + 1) - 1;
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
public void All_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
CurrentPageIndex = 0;
if (RecordCount > 0)
PageSize = Convert.ToInt32(RecordCount);
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
if (AfterPageing != null)
{
AfterPageing();
}
}
protected void imgGo_Click(object sender, EventArgs e)
{
if (BeforePageing != null)
{
BeforePageing();
}
if (PageingLoadData != null)
{
int pageCount = Convert.ToInt32((RecordCount - 1) / PageSize + 1);
int goPageIndex= ConvertToInt(this.txtGo.Text.Trim());
if (pageCount >= goPageIndex)
{
CurrentPageIndex = goPageIndex - 1;
PageingLoadData();
ShowStatus(CurrentPageIndex);
}
}
if (AfterPageing != null)
{
AfterPageing();
}
}
private int ConvertToInt(string p)
{
int refvalue = 0;
try
{
refvalue = int.Parse(p);
}
catch (Exception)
{
}
return refvalue;
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
this.Page.ClientScript.RegisterHiddenField("hidTextBoxGoClientID", this.txtGo.ClientID);
}
}
测试页面前台代码：
<div>
<asp:GridView ID="GridView1" CssClass="GridViewStyle" runat="server" BorderWidth="0px"
CellPadding="0" AutoGenerateColumns="False" Width="100%" AllowSorting="True"
EmptyDataText="暂无数据">
<FooterStyle CssClass="GridViewFooterStyle" />
<RowStyle CssClass="GridViewRowStyle" BackColor="#F7FAFD" />
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID">
<FooterStyle CssClass="hide" />
<HeaderStyle CssClass="hide" />
<ItemStyle CssClass="hide" />
</asp:BoundField>
<asp:TemplateField HeaderText="序号">
<ItemTemplate>
<%#Container.DataItemIndex+1%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="ID" DataField="ID" />
<asp:BoundField HeaderText="PID" DataField="PID" />
<asp:BoundField HeaderText="name" DataField="name" />
<asp:BoundField HeaderText="开挖面积" DataField="GROUPNAME" />
</Columns>
<HeaderStyle CssClass="GridViewHeaderStyle" HorizontalAlign="Left" />
<AlternatingRowStyle BackColor="#EBF4FA" />
</asp:GridView>
<div style="text-align: center;">
<center>
<crc:Pager runat="server" ID="uxPager" OnInitLoadData="uxPager_InitLoadData" OnPageingLoadData="uxPager_PageingLoadData" />
</center>
</div>
</div>
测试页面后台代码;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGridProject("select * from student");
}
}
private void BindGridProject(string sql)
{
ViewState["sql"] = sql;
this.uxPager.PageSize = Convert.ToInt32(ConfigurationManager.AppSettings["PageSize"]);
this.uxPager.LoadData();
}
#region 分页相关
/// <summary>
/// 初始化分页控件
/// </summary>
protected void uxPager_InitLoadData()
{
int totalRecords = -1;
DataTable table = QueryTable(this.uxPager.CurrentPageIndex, this.uxPager.PageSize, ref totalRecords);
this.uxPager.RecordCount = totalRecords;
LoadGridView(table);
}
/// <summary>
/// 加载分页控件
/// </summary>
protected void uxPager_PageingLoadData()
{
int totalRecord = this.uxPager.RecordCount;
DataTable table = QueryTable(this.uxPager.CurrentPageIndex, this.uxPager.PageSize, ref totalRecord);
LoadGridView(table);
}
/// <summary>
/// 获取数据源
/// </summary>
/// <param name="pageIndex"></param>
/// <param name="pageSize"></param>
/// <param name="totalRecord">总页数</param>
/// <returns></returns>
public DataTable QueryTable(int pageIndex, int pageSize, ref int totalRecord)
{
OracleDataBase odb = new OracleDataBase("0");
string sql = ViewState["sql"].ToString();
totalRecord = odb.GetDataSet(sql).Tables[0].Rows.Count;
string sqlTableName = sql;
string selectSql = StructurePagingSql(sqlTableName, pageIndex, pageSize, null);
return odb.GetDataSet(selectSql).Tables[0];
}
/// <summary>
/// 分页语句
/// </summary>
/// <param name="strSQL"></param>
/// <param name="pageIndex"></param>
/// <param name="pageSize"></param>
/// <param name="orderBy">排序</param>
/// <returns></returns>
public String StructurePagingSql(string sqlTableName, int pageIndex, int pageSize, string orderBy)
{
int startIndex = pageIndex * pageSize;
int endIndex = startIndex + pageSize;
StringBuilder selectSql = new StringBuilder();
selectSql.Append(string.Format(" SELECT * FROM (SELECT A.*, ROWNUM RN FROM ({0}) A ", sqlTableName));
selectSql.Append(string.Format(" WHERE ROWNUM <= {0} ) WHERE RN > {1} ", endIndex, startIndex));
return selectSql.ToString();
}
private void LoadGridView(DataTable dt)
{
this.GridView1.DataSource = dt;
GridView1.DataBind();
}
#endregion
